Each graph below is the graph of an exponential function of the form ka^x (where a > 0). Match each graph with the correct option.
A) k < 0 and a > 1
B) k > 0 and a < 1
C) k < 0 and a < 1
D) k < 0 and a > 1
(A) k > 0 and a < 1
(B) k > 0 and a > 1
(C) k < 0 and a < 1
(D) k < 0 and a > 1